They were very happy together in Trachis, and according to Pseudo-Apollodorus's account, often sacrilegiously called each other "Zeus" and "Hera."[1] This angered Zeus, so while Ceyx was at sea (going to consult an oracle according to Ovid's account), the god threw a thunderbolt at his ship. Ceyx appeared to Alcyone as an apparition to tell her of his fate, and she threw herself into the sea in her grief. Out of compassion, the gods changed them both into halcyon birds, named after her.

Ovid and Hyginus both also recount the metamorphosis of the pair in and after Ceyx's loss in a terrible storm, though they both omit Ceyx and Alcyone calling each other Zeus and Hera- and Zeus's resulting anger - as a reason for it. Ovid also adds the detail of her seeing his body washed up on the shore before her attempted suicide.

Since halcyon is of a kingfisher (tree kingfisher to be exact), I gave her kingfisher wings. The "halcyon days", the seven days in winter when storms never occur. The phrase has since become a term used to describe a peaceful time generally. But in this case, it's not the halcyon days XD. I think I'll give her the ice element considering halcyon days occurs in the arctic region. source [link]